Firefighters were called out to Wisbech Town Council offices on last night to pump out the cellars.
A burst water main flooded the cellars of town’s Lloyd’s branch along with the vaults in the corn exchange below the council offices.
Councillors continued with their meetings as the water was pumped out of the cellars.
Leader of the town council David Oliver has praised firefighters for their response.
He said: “They pulled out all the stops. They were doing an excellent job.
“These things unfortunately happen. When I came around the corner and saw two fire engines I was worried that it would burn down.”
At the time of writing, council officers were waiting for the ok to go into the cellars to learn about the damage.
Anglian Water has confirmed that a main in North Brink burst last night.
Engineers were out within an hour to stop the water escaping.
A spokesman said: “We are very sorry for the inconvenience that would have been caused to these offices. We will be working hard to put it right and will pick up the tab for any repairs that need to be made.”